Umbrella



FIG. 1 is a perspective view of the umbrella of this invention;

FIG. 2 is a front elevational view thereof; the rear elevational view,the right side elevational view and the left side elevational view beinga mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a perspective view of the umbrella in the upright position.

The ornamental design for an umbrella, as shown and described.